Author: Jamie Pratt
MDL-47494 ddwtos: OU-1597 Renaming question types.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=48980d9d604ad12ad9a19c1535192e8993a6093b
http://github.com/moodle/moodle/commit/48980d9d604ad12ad9a19c1535192e8993a6093b
+ 3.0 en [addingddwtos,qtype_ddwtos]
+ 3.0 en [ddwtos,qtype_ddwtos]
+ 3.0 en [editingddwtos,qtype_ddwtos]